Musical instrument amplifier



FIG. 1 is a perspective view of a musical instrument amplifier showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof.

The broken line showing on FIGS. 1-3 and 5-7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a musical instrument amplifier, as shown and described. 